Liquid control arrangement for washing machines



J. HERTZ Jan 15, 1952 LIQUID CONTROL ARRANGEMENT FOR WASHING MACHINES 4Sheets-Sheet 1.

Filed March 8, 1946 INVENTOR. jbrgalz Herz z Jan. 15, 1952 J -r22,582,543

LIQUID CONTROL ARRANGEMENT FOR WASHING MACHINES Filed March 8, 1946 4Sheets-Sheet 2 INVENTOR. Jorge/2 Herzz Jan. 15, 1952 J, HERTZ 2,582,543

LIQUID CONTROL ARRANGEMENT FOR WASHING MACHINES Filed March 8, 1946 4Sheets-Sheet 5 i INVENTOR. .Targen. J-[ar'ZL J. HERTZ 2,582,543

LIQUID CONTROL ARRANGEMENT FOR WASHING MACHINES Jan. 15, 1952 4Sheets-Sheet 4 Filed March 8, 1946 INVENTOR. Jorge/z Herz z flZ/arneys rThe present invention relates mgrt ce orby'botml s'rlir sis PATENTZUO'FFICE LIQUID CONTROL ARRANGEMENT on WASHING MACHINES Jorgen Hertz,Copenhagen, Denmark airihsingliquid or another suitable kind of. liq-Iiii'dii's squir'tedwut underithe pressure from a water pipe, and inwhich machines the liquid outlet openingsfor the particular liquid aremade v:efc'tiv'e" periodically by means of a liquid-control arrangement::consisting of a piston- 'or slide- .ar'rangement infrcombination witha cylinder or a similar wall; thesaid' two parts of the liquid fcontrolarrangement having a relative motion in the Whollyior-martlylongitudinaldirection and' being 'shaped'with liquid passage'openings; which during:the rsaid' relative motion are brought to correspond successively.

:tror: arrangement for a dish-washing machine which may be of thesamekind as-the machine mentioned. ,above,- and in which -the twopartsofi theiliquid control arrangements are of *an especially advantageousconstruction. s More clearly. defined the invention relates to a liquidcontrol arrangement for a dish-washing to *a' liquid; condish-washing ma1 Assuming March s, 1946, Serlal No. 653,001 I t eme March 28, 1945 ,4Claims. (01.137-139) The invention furthermore relates to variousdetails in a liquid control arrangement for the dish-washing machinehere'referred to.

In the drawings have been shown what is necessary for understanding theinvention. Fig. 1 shows a partly schematical vertical central sectionthrough an embodiment of a dish-washing machine in accordance with theinvention.

Fig. 2 on a larger scale shows a horizontal sectionon line 2-2in'Fig. l;'j-

Fig. v3 on a still larger scale shows the liquid control arrangement ofthe machine in section.

Fig. 4 likewise on a. larger scale shows the liquid control arrangementin side elevation and aisection through part of the supply pipe'for Ithe driving pressure liquid and a valve -fitted in machine, especiallyfor household purposes; of

the kind'having. a plurality of liquid squirting openings; e. g; nozzlesor nozzle groups; through which a liquid -e g. cleaningliquidor-rinsingliquid or liquid of another .kind -issquirtedout,

the said liquid squirting openings being "made periodically active bybeing fed'from aliquid control arrangement with two parts that "arewholly or partly movable longitudinally 1 in %rela;',

tion to eachother, oneof whichzpartsfthas'a slight number,:e:-g: onlyone or ,a couplerof liquid outlets, and the other has a pluralityof;?-liquid part oi the liquid control arrangement-ands piston, which ismovable in a container; form independent parts, and furthermore that thesaid the pipe part, the closing of which valve is effected from thepiston;

Fig. ,5 schematically and partly in section shows a modified embodimentof the'drlving arrangement for the main members of the ma- V chine saiddriving arrangement being driven from the piston.

l in Fig. -1 designatesthe dish-washing space or chamber of the machine,which chamber I has a bottom part 2 witha drain 3. The chamber I isaccessible through'doors'or shutters and contains one or more shelves orcorresponding parts which form a carrying frame 4 or other suitablesupporting means for the dishes. In the embodiment shown the carryingframe 4 is movably mounted, being .carried by a vertical spindle 5 whichcan be caused to rotate. The lower end of the spindle 5 is mounted in afoot piece -6 which is placed over the outlet opening from the chamberI, while the upper 'end of the spindle 5 carries the lower part of aclaw coupling 1 or a similar coupling mechanism. The upper part of thecoupling is carriedby an upper spindle part 90 situated in continuationof the spindle 5, which spindle part 90 in the vicinity of its two endsis journalled in a tubular case 10 which is rigidly connected to, e. g.,the upper wall 80 of the chamber I. Between the .case 10 and the upperspindle part 90 journalled therein a helical movable partoi ,the liquidcontrol arrangement is moved on account of a motion of the pifiton,

mainly by a; liquidpresspre .in -.the;container eitherby a drivingarrangementp15 by a-retur-nwhile the return motion ,of -,the-piston-. iscaused gear 9 is turned by: the piston 23 shown in Fig. 2

moving outwards, the'spring 8, Fig. 1, will be tensioned while at thesame time the upper part of the coupling l together with the upperspindle part 9% rotate, while the spindle 3 and the lower part of thecoupling 1 remain immovable together with the carrying frame 4 and thedishes placed upon it. The tensioned spring 8 will during the returnmotion of the piston 23, Fig. 2, which will be referred to later, acttoturn the spindle and the carrying frame which rotatory motion will alsobe assisted by the spring 52 shown in Fig. 2, which springs 52 will bementioned later.

The horizontal wall 83 above the chamber serves for bounding a spacewhich contains the liquid control arrangement of the machine.

The dish-washing machine shown is built with such a pipe system that themachine is operated by water under pressure which may be supplied eitherfrom a special pump or from a house water main. The water is suppliedthrough a supply pipe I0, Fig. 2, which is connected to a chamber Iclosed at its outer end, and in which a valve |2 may move, which valve Hcan close a valve seat |3. The valve spindle i4, as shown in Figs. 2 and4, passes, through packing. out of the inner end of the chamber ii.Between this end and the valve seat |3 the valve spindle i4 is disposedconcentrically in a tubular passage 5 from which leads a pipe I6,through which the water under pressure supplied through the pipe I0 isled to the three-way cock shown in Fig. 2 when the 'valve I2 is open.The three-way cock H can be set so as to supply water under pressure toany one of the three pipes l8, l9, and 2% connected with the cock IT.The pipe l8 connects with a pressure chamber 2| formed by a cylindricalcontainer 22 which is closed by a piston 23 movable therein. From thepressure chamber 2| in the container 22 leads a drain pipe 24 with aregulating valve 25. The drain pipe 24 may continue vertically downthrough the chamber I, Fig. l, and end below at the bottom of thelatter, so that liquid flowing off through the pipe 24 is supplied tothe drain 3.

The pipe 24 from the three-way cock [1 may be seen in part in Fig. 2, inpart in Fig. l, which show that at its lower end the pipe 23 connectswith a container 25. The container 26 may contain a water-solublecleaning medium, e. g., in the form of a cartridge placed in thecontainer 26. From the container 25 a pipe 21 leads to several branchpipes 28 and 29. The pipes 28 and 29 are provided with ejection nozzles30 for cleaning liquid or groups of such nozzles or other correspondingliquid exhaust openings, through which cleaning liquid may be injectedinto the chamber The pipe i3 from the three-way cock I i may consist ofa'fiexible portion, or there may be connected to the pipe IS a rubberhose, as indicated by the hose 3| in Fig. 3. The pipe It] connects witha liquid supply pipe 32 mounted on the piston 23, which pipe 32 has onits end a slide 33 which does not form part of the piston proper andconsists of a short and externally cylindrical sliding member preferablyof considerably smaller diameter than the piston. Fig. 3 shows how theliquid supply pipe 32 is secured to the piston 23 by a bolt 32 The slide33 consists of a short and externally cylindrical pipe or sliding memberwhich is closed at its outer end and has an internal cavity situated incontinuation of the liquid supply pipe 32. In the slide 33 there are twodiametrically oppositely placed liquid outlets 34, only one of whichappears in the drawing, which during the motion of the slide willregister with liquid passage openings 35, which are disposed in twodiametrically oppositely placed rows in a tubular slide guide 34. Thetubular slide guide 3% has on its outer side a number of ring collars3?, Fig. 3, which together with the outer surface of the slide guide 33and a tubular jacket 38 fitted around the ring collars 3i bound a numberof ring-shaped chambers 39. The chambers 39 are provided with outletport-s by openings in the jacket '38. The liquid released from thechambers flows through pipes 48 (Figs. 1, 2, and 3) to rinsing liquidnozzles 4| in the chamber I, Fig. l. The said nozzles 4| or other liquidejection openings may consist of groups ofnozzles or groups of ejectionopenings.

Two ring chambers 42 at the end-s of the slide guide 36, respectively,have such length that with these end chambers 42 register two liquidpassage openings 35 in the slide guide 36. The end chambers 42 formdrains for liquid under pressure which when the slide 33 is near or atone of its end positions, flows from the slide 33 through the endchambers 42 and through the outlets of the latter inthe jacket 38 tooutflow pipes 43, which as shown in Fig. 2 are placed on either side ofthe pipes 40. The outflow pipes 43 terminate at the bottom of thechamber in Fig. 1 but are for the sake of clarity not shown in thisfigure.

As shown in Figs. 2 and 4 the liquid supply pipe 32 for the slide 33 isdisposed parallel to the: axis of the piston 23 and the valve spindle 4for the automatic valve l2. Fig. 4 shows that the end of the valvespindle I4 is screwed into or otherwise connected to an extension part44 which projects into a cavity in the piston 23 and there terminates ina head 45. Between the latter and the plate which closes the cavity inthe piston 23 a spring 46 is inserted which, when the piston 23 is inits'inward position, serves to keep the valve |2 pressed against theseat l3. On the extension part 44 there is a radial pin 4'! serving as ashort handle by means of which the valve spindle l4 may be manuallydisplaced somewhat to the right in Fig. 4, overcoming the pressure ofthe spring 46 so that the valve I2 is moved ofi of the seat- |3.

On the outer end of the piston 23, there is mounted a toothed rack 48parallel to the axis of the'piston 23 as shown in Fig. 2. The rackmeshes with a gear 49 which is mounted on a concentric gear 50, whichmeshes with the gear formerly mentioned, so that the spring 8 shown inFig. 1 is tensioned, when the piston 23 and the fade are moved to theright as shown in Fig. 2. The rack 48 is provided with radiallyprojecting arms 5| which through springs 52 are connected to radiallyprojecting arms 53 on the container 22.

The cleaning liquid nozzles 30 and the 1ins ing nozzles 4| respectivelyor the groups of nozzles or ejection openings corresponding to thesenozzles need not, the machine having a rotatory' carrying frame for thedishes, control the whole of the inner space in the chamber I, it beingsufficient that the nozzles 30 and the nozzles 4| respectively togethercontrol e. g. half of a section through the chamber. The zone controlledby the nozzles need not form a coherent surface.

The machine shown and described functions in the following way.

When the soiled dishes have been placed on the carrying frame 4 thechamber i is closed and a new cleaning medium cartridge may be placed inthe container 26, Fig. 1. The threeway cock I! is turned so thatcommunication is effected only between the pipe 16, Fig. 2, and the pipel8 to the pressure chamber 2| behind the piston 23. Next the pin orhandle 41 of the valve spindle I4 is manually moved somewhat to theright as shown in Figs. 2 and 4, whereby the valve ['2 is raised fromits seat i3. From the supply piping ill liquid under'pressure,preferably water from a house water main, will now flow to the pipe itand through the three-way cock I! and the pipe Hi to the pressurechamber. 2| in the container 22. This causes the piston '23 to moveoutwardly in the container 22; which gives rise to a correspondingmotion of the valve i2, the slide 33 and the rack at. If the pressure isnot sufilciently large, mechanical means may W be fitted to make up forthe lack in pressure. During the outward movement ofthe .pistDnZE, thesprings 52 are tensioned, Fig. 2, and the helical spring 8, Fig. l,surrounding the spindle is tensioned, as, the gear 3 is rotated by therack 48. The upper-part of the claw coupling 2 is thereby rotated'inrelation to its lower part on the spindle 5 for the carrying frame 4.The outward travel of the piston 23 ceases when the gear wheel 49, Fig.2 meets the end of the row of teeth on the rack 48 nearest the piston23.

When the piston 23 is in its extreme outward position, the three-waycock H is turned so that pipe !8 is closed and communication isestablished between the liquid supply pipe l6 1 and the pipeto thecleaning medium container '26, from which the liquid flows to theejection nozzles 30, so that in the chamber 1 a fog of cleaningliquid isformed at any rate in zones which together control at least half of across section in-the chamber I. At the same time the springs 52,'Fig. 2will movethe piston 23in wardly. The velocity of movement of the piston23 is regulated by means of the valve on the drain pipe 24. wardmovement of'the piston 23 the helical spring 8, Fig. 1 turns the spindlepart' 99 and, through the engaged parts of the'coupling 1, turnsthefspindle 5 and the carrying frame t with the dishes. turned a numberof times before the piston 23 reaches its innermost position in thecontainer 22. Simultaneously with the piston 23 reaching its innermostposition, the valve l2 will automatically be pressed against the valveseat 13 or the handle 4'1 onth'e valve spindle M. The

piston '23 is thereby displacedto its outermost position tensioningthesprings'52 and 8.

When the piston is in its extreme outward position, the three-way cock His turned so that pipe I8 is closed and'coinmunication is establishedbetween the liquid supply pipe i5 and the pipe is to the liquid Su plypi 'az or-me slide 33. 'Through the pipe e2 the wateru nder pressureflows to theslide' 33 and through the outlets 34 through the openings tothe ring chambers 39. From these chambers 38 thewat'er flows through thepipes 42, Figs. 1 and 2 to the rinsing nozzles 4L1 only one-nozzle or'group-of nozzles 41* isactive at any one time} em e or-11; one ringchamber IiQandonly one of the 'i insi'ng liquid pipes are suppliedwithwater by the slide 33 at any onetime. Simultaneously with Simultaneouslywith the'inf The carrying frame 4 is thus i l ll the inward movement ofthe piston 23 the spring 8, Fig. l; as aboveexplained, turns thecarrying frame [with the: dishes, so that the latter are rinsed by meansof jets or'fog jets of rinsing water ejected from the nozzles or groupsof nozzles 4|. As only one nozzle or group of nozzles ii is activeat'xany one time, this action is effected with the total amount .ofpressurev exerted on the ejected water, e. g. with practically speakingthe full pressure from a house water main.

In, the extremepositions of the slide 33 the outletsMzof the slide 33will register with the openings 35 at the ends of the guide 35 whichcommunicate with the end chambers 42, Figs. 2 and 3, and'the inflowingwater under pressure will be discharged through the pipes 43. As

the s'lide guldefifi is open at its ends, water underpressure which mayleak out between the slide-33 and the slide guide 36 and which might notpass through openings 35 in the slide guide 36 will run d0wn to thehorizontal Wall 8i), which separates the dish-washing space or chamber ifrom the space or chamber containing the liquid control" arrangement:There may be provided through the wall a passage opening an outlet pipefor pressure water, which may escape from the slide guide 36. I Theinvention is not limited to the embodiment of the machine shown. inFigs. 1-4 and described above. e

By way or example the valve. 12 need only have the spindle i4 guidedvfor rectilinear motionwhile at the same time between'the piston 23andthe valve spindle I 4 there maybe such a connection-that duringitsreturn motion the piston 23*directly or indirectly. causes such adisplacement of the valve spindle is that thereby the valve I2 is movedtowards and pressed against'its seat 13; The opening of the valve l2'and the'dis'pla'cement'of the spindle i4 correspondingthereto can on theother hand be wholly or partly independent of the outward motion of thepiston 23.-'-The valve spindle M can be 'rnoved'to-the right in Figs. 2and 4 either by apull performed only, on the spindle Hi or other ways.If the valve spindle M is indirectly connected to the piston 23, .e. g.,as shown in Fig. 5 the valve I2 can be opened, e. g., by theirltro'duti'o'nof liquid under pressure into the container 22 throughanother pipe than the pipe 1 8 shown"in Fig. 2, such as "a special pipeprovided 'witha cock and connected with the container 22," so that byopening the cock on the said speeial pipe tne piston. 23 can be; movedout wafdly' aud -thereby the'ivalve. l2v be opened.

Si-i'lr especial pipe .8lrprovided with acock $9 is showhin Fig: 5: '1

the 'mbbdim'ent iofi' the machine shown in I Fig'si l l' the slide '33is directly connected to the piston 23, which also applies to the valve12 and the toothed rack =48; This is not necessary, as between thepiston 23 and the liquid supply pipe 32 an intermediate member may beinserted, e. g., a lever or a toothed sector, so that a certain motionof the piston-23 gives rise to a longitudinal motion, diiferent from theformer motion of the slide 33fth motion of which can take place inanother direction than the motion of the piston 23 correspondingly theremay between the piston'zs and the toothed rack 48 be insertedintermediate memb'ersjlike those mentioned above, so that'also theihotionof the toothed rack is can get-anotheraslze and direction thanthem-otion of the piston 23. The same may be the casewith'the' valvespindle M- and thereby with the valve I2. The possibilities mentionedabove will be explained below in connection with Fig. 5.

Fig. shows schematically and partly in section a modified embodiment ofthe driving arrangement for the main members of the machine moved by thepiston 23. In Fig. 5 corresponding parts are designated with the samereference designations as in Figs. 1-4. On the end of the piston 23there are two outwardly-projecting rods 82 and 83, having radiallyprojecting pins 84 and 85, respectively. Around the pin 84 engages afork on a double-armed lever 86 which is pivoted on a stationary spindle81, and the other end of which engages around a radial pin 88 on theliquid supply pipe 32, which is provided with a liquid supply meanssimilar to the pipes l9, and 31 in Fig. 3. During the movement of thepiston 23 the slide 33 will be moved, and this movement of slide 33 can,by suitably shaping and mounting the intermediate link 85, be made todiffer in amount and direction from the movement of the piston 23.

In a similar way the short toothed rack 43 shown in Fig. 5, which ismounted for reciprocating movement, may by means of a double-armed lever83, which is pivoted on a stationary spindle 5. 8 and has fork endsengaging the pins 85 and 8! on the rod 83 and the toothed rack 58respectively, be given reciprocating movement differing in amount anddirection from the movement of the piston 23.

Also the valve l2 shown in Fig. 5 in the liquid supply pipes l0, l5, it,such as are shown in Fig. 2, may be moved by the piston 23 in Fig. 5

in a way similar to the slide 33 and the toothed rack 48, i. e., bymeans of a pivoted lever similar to the lever 89, the outer fork end ofwhich is engaged around a radial pin 92 on the valve spindle l4 guidedfor rectilinear motion instead of, as shown in Fig. 5, engaging aroundthe transverse pin 9| on the toothed rack 48. In the embodiment shown inFig. 5 the valve 52 and the spindle M are moved indirectly by the piston23 through the toothed rack 48 and only during part of the reciprocatingmotion of the toothed rack 53. On the toothed rack 48 there is atransverse pin 34, which in Fig. 5 is seen engaging with a fork 95 on ashort lever 98 which is pivoted around a spindle 9'! and the other,fork-shaped end of which engages around the transverse pin 92 on thevalve spindle M. The prongs of the fork 35 are of unequal lengths. Thelever 96 is shown nearly in its middle position, the piston 23 beinglikewise shown nearly in its middle position. When the piston 23 issituated in its innermost position and starting its outward travel, thelevers 89 and 96 will be in such positions of rotation that the toothedrack 48 will be in its lowest position in Fig. 5, while at the same timethe valve I2 abuts on the seat l3.

In this position of the piston 23 and valve l2 the right end of thelever i1; will be directed obliquely downwards in Fig. 5. During thecommencing travel outwards of the piston 23, the lever 9&5 will beturned counterclockwise and. the valve I2 thereby be opened, the toothedrack 58 being moved upwards in Fig. 5. The said upward motion of thetoothed rack 48 and the opening of the valve I2 caused thereby beeffected by a momentary admission of liquid under pressure into thecontainer 22 through opening of the cook 98 on the special pressureliquid pipe 8!. When the toothed rack 45 has moved so far upwards inFig. 5 that the pin 95 gets clear of the short prong on the fork 95, thevalve 12 will be in its maximum open position and remain in thisirrespective of the fact that the toothed rack 48 continues its upwardmotion which lasts until the piston 23 reaches its outermost position.When the pin 94 clears the short prong of the fork 95, the lever 95 willfrom its starting position be turned between 60 and counter-clockwiseand will consequently be in thisposition, when the piston 23 has arrivedin its outermost position. During the return motion of the piston 23 thetoothed rack 48 will be moved downwardly in Fig. 5, and the transversepin 9d. will during the last part of the downward motion of the toothedrack 48 pass the short prong of the fork 35 and abut on the long prongof the fork 85, so that the lever 96 is turned clockwise and back intoits starting position, in which the valve 12 will be brought to abut onthe valve seat l3, and the liquid supply Ill, l5, 16 to the valve 33thereby be interrupted, the valve l2 closing the annular liquid passage[5.

Also in the embodiment shown in Fig. 5 the opening of the valve l2 maybe performed mechanically, by the lever 35 having a handle, by which thelever can be turned from the position directed obliquely downwardly upinto the position shown in Fig. 5 or even past the latter position.Irrespective of whether the opening of the valve i2 is performedmechanically, the valve 52 will also in the embodiment shown in Fig. 5be closed by the piston 23 during the return motion of the latter.

I claim:

1. A valve control device for controlling sequential flow of liquidunder pressure to a plurality oi -discharge ports in said device, thecombination of a conduit for said liquid provided with a reciproablevalve for opening and closing said conduit; a cylinder; a pistonreciprocable in said cylinder and yieldably connected with said valve; asecond conduit connected with said cylinder; :1 flexible conduitconnected at one end to said piston for reciprocation therewith andprovided at its other end with means for supplying said liquidsequentially to a plurality of discharge parts; means for alternativelyconnecting said first conduit with said second conduit so that theliquid moves said piston in said cylinder in one direction, and withsaid flexible conduit so that said liquid flows through said parts;means for automatically returning said piston, after it has been movedby said liquid, said valve closing said first conduit when said pistonis returned; and additional means for moving said valve to open firstconduit.

2. A valve control device for controlling quential flow of liquid underpressure to a plurality of discharge ports in said device, thecombination of a conduit for said liquid provided with a reciprocablevalve for open ng and closing said conduit; a cylinder; a pistonreciprocahle in said cylinder; 2. member mounted on said piston forclosing said conduit by said valve; second conduit connected with saidcylinder; ,a flexible conduit connected at one end to said pistonreciprocation therewith and provided at its other end with means forsupplying said liquid sequentially to a plurality of discharge ports;means for alternatively connecting said first conduit with said secondconduit so that the liqui moves said piston in said cylinder in one direon, and with said flexible conduit so that said liquid flows throughsaid ports; means for automatically returning said piston, after it hasbeen moved by said liquid, said valve closing said first conduit whensaid piston is returned; and. additional means for moving said valve toopen said first conduit.

3. A valve control device for controlling sequential flow of liquidunder pressure to a plurality of discharge ports in said device, thecombination of a conduit for said liquid provided with a reciprocablevalve for opening and closing said conduit; a cylinder; a pistonreciprocable in said cylinder; a member mounted'on said piston forclosing said conduit by said valve; a second conduit connected with saidcylinder; a third conduit comprising a flexible pipe and a rigid pipemounted on said piston for reciprocation therewith, and provided withmeans for supplying said liquid sequentially to a plurality of dischargeports; means for alternatively connecting said first conduit with saidsecond conduit so that the liquid moves said piston in said cylinder inone direction, and with said third conduit so that said liquid flowsthrough said ports; means for automatically returning said piston, afterit has been moved by said liquid, said valve closing said first conduitwhen said piston is returned; and additional means for moving said valveto open said first conduit.

4. A valve control device for controlling sequential flow of liquidunder pressure to a plurality of discharge ports in said device, thecombination of a conduit for said liquid provided with a reciprocablevalve for opening and closing said conduit; a cylinder; a reciprocablepiston nor- 10 mally disposed toward the inner end of said cylinder; amember'mounted on said piston for closing said conduit by said valve; asecond conduit connected with said cylinder; a flexible conduitconnected to said piston for reciprocation therewith and provided withmeans for supplying said liquid sequentially to a plurality of dischargeports; means for alternatively connecting said first conduit with saidsecond conduit so that the liquid moves said piston toward the outer endof said cylinder, and with said flexible conduit so that said liquidflows through said ports; a controlled discharge conduit connected tosaid inner end of said cylinder for evacuating liquid discharged by thereturn of said piston when said first conduit is connected to saidflexible conduit, and said member being constructed to cause said valveto be moved to close said first conduit during the last part of thereturn motion of the piston; and additional means for moving said valveto open said first conduit. t

JORGEN HERTZ.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name. Date 1,598,238 Brooks Aug. 31, 19261,992,877 Monthan Feb. 26, 1935 2,372,205 Hertz Mar. 27, 1945

